Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005dps....37.5101v&link_type=abstract
American Astronomical Society, DPS meeting #37, #51.01; Bulletin of the American Astronomical Society, Vol. 37, p.733
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We present an analysis of Titan's limb spectra obtained by CIRS (Composite InfraRed Spectrometer) during the Tb (December 13, 2004) and T3 (February 14, 2005) flybys. Tb spectra were recorded at equatorial latitudes (15oS) and T3 spectra near the north pole (80oN). We mainly focused on limb spectra to retrieve vertically-resolved information on the thermal profile and abundance profiles of some molecules (acetylene, ethane, diacetylene ...). For Tb observations, the viewing altitudes span the range 250 to 470 km, and in T3 they cover the interval 80-475 km. In order to determine abundance profiles, the temperature profile must be known as a first step. It is retrieved from the emission of the ν 4 methane band centered at 1305 cm-1 (7.7 microns), using an inversion algorithm of the transfer equation. For Tb, a set of 8 limb spectra was used (giving information in the 250-480 km range) along with a nadir spectrum giving additional information at lower levels (in the range 200-250 km). In the case of T3, a set of 7 limb spectra was used giving information between 230 and 475 km. Both retrieved thermal profiles clearly show a stratopause, located around 310 km at 15oS with a temperature of 186 K, and around 390 km with a temperature of 205 K at 80oN.
The retrieved temperature profiles were then used to model the observed spectra in the range 600-1000 cm-1. We will present the vertical profiles of the gaseous absorbers present in this range as derived from the best fits of the whole set of observed spectra.
Achterberg Richard K.
Bezard Bruno
Cirs Investigation Team
Conrath Barney J.
Flasar Michael F.
No associations
LandOfFree
Analysis of Titan Cassini/CIRS limb spectra from the Tb and T3 flybys: temperature and abundance profiles at 15oS and 80oN does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Analysis of Titan Cassini/CIRS limb spectra from the Tb and T3 flybys: temperature and abundance profiles at 15oS and 80oN, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of Titan Cassini/CIRS limb spectra from the Tb and T3 flybys: temperature and abundance profiles at 15oS and 80oN will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-952432